Coking-kiln.



No. 732,097. PATENTED JUNE 30,1903. 0. W., A. J. METTLER.

GOKING KILN.

APPLICATION mm) 001'. 22, 1902.

; fi Z m H0 MODEL a *fi Zak-221m Nd. 732,097. PATENTED JUNE 30, 1903.

' G. W., A. & J. METTLER.

GOKING KILN.

APPLIUATION TILED 00122, 1902.

MW I M P V// A 4 SHEETS-SHEET 3.

m RN PATBNTED JUNE 30, 1903. G. W., A. & J. METTLBR.

GOKING KILN.

APPLICATION rILnn 001222, 1902.

4 SHEETS-SHEET 4.

30 MODEL.

WW E MJN 6 N 8 mqw r J m m i I l i 0 %W[ MN /m a N m a Z R k m wN 5 FE n\w a. Mr NW -Q MWN N m M n Z N ,w aw v/wmo UNITED STATES PATENT PatentedJune 30, 1903.

OFFICE.

CASPAR W. METTLER, ADOLF METTLER, AND JACOB METTLER, OF NEW HAVEN,CONNECTICUT, ASSIGNORS \VEST HARTFORD, CONNECTICUT.

COKING TO FREDERICK C. ROCKWELL, OF

SPECIFICATION forming part of Letters Patent No. 732,097, dated was 80,1903.

Application filed October 22, 1902.

To otZZ whom it may concern.-

Be it known that we, CASPAR W. METTLER, ADOLF METTLER, and JACOBMETTLER, citizens of the United States, residing at New Haven, in thecounty of New Haven and State of Connecticut, have invented certain newand useful Improvements in Coking-Kilns, of which the following is aspecification.

This invention relates to a kiln which is particularly adapted forcoking peat, but is also applicable for other uses.

The object of the invention is to provide a comparatively simple kilnand holder for the material to be coked which is easy to operate andwhich will produce very hard and desirable fuel without danger ofdestroying or injuring the product by overheat.

The kiln that is illustrated has two long low coking-chambers, eachhaving the necessaryfurnaces, fines, and dampers, and a track for thepeat-holders which have lattice sides and ends, dumping grate-bottoms,and closefitting hoods that are only open at the bottom below thegrates.

Figure 1 of the views shows a longitudinal vertical section of a kilnthat embodies the invention with three holders on the track in thecoking-chamber. Fig. 2 shows a horizontal section of the same. Fig. 3shows a transverse vertical section of the kiln on larger scale, takenon the plane indicated by the dotted line x of Fig. 2. Fig. 4 shows alongitudinal vertical section of one end of the kiln, taken on the planeindicated by the broken line m of Fig. 3. Fig. 5 shows a plan of aholder with the bottom grates partly open. Fig. 6 shows a transverseVerticalsection of a holder, taken on the plane indicated on the brokenline 0; of Fig. 5. Fig. 7 shows a perspective view of a piece of fuelthat is coked in this kiln.

The kiln shown is built of brick with two long low chambers 1, separatedby a brick partition. The ends of these chambers are closed by irondoors 2. Two furnaces 3 extend transversely beneath both chambers nearone end of the kiln. The furnaces have common grates 4, ash-doors 5, andfuel-doors 6 at each side of the kiln. Flues 7 in the side Walls andfines 8 in the center wall of the kiln lead Serial No. 128,291. (Nomodel.)

from 'the fire-box of each furnace to the top of the kiln. These finesopen to'the tops and bottoms of the coking-chambers. Dampers 9 withoperating-handles 10 are arranged to control these openings. A fine 11is arranged longitudinally at the bottom of each coking chamber.Openings 12 are made from the coking-chambers to these flues, anddampers 13 with handles '14 are arranged to control these openings.These smoke-flues extend out from under one end of the kiln and enter aflue 15, that opens into a tank 16 at the bottom of stack 17. When thefurnaces are first fired up, the dampers at the lower openings from thetines into the coking-chambers and the dampers at the openings into thesmokefiues at the bottoms are opened wide, so as to obtain the fulleffect of the draft. After the fire is started the lower flue-openingsare closed and the upper flue-openings are opened, so that the heatedproducts of combustion will enter the coking-chambers at the top andpass down and out at the bottom, the openings to the smoke-fines at thebottom being out down to properly regulate the draft.

Along the floor of each coking-chamber is a track formed of rails 18.The peat-holders are supported on wheels 19, that fit the tracks. Thesides and. ends of these peat-holders are built of interwoven strips ofiron 20. Inside of this lattice frame is a lining of wire-netting 21.The bottom of each holder is formed of sections of grating 22.These'grate-sections are preferably hinged at their outer edges to theside frames 23 of the holder. A shaft 24. is arranged longitudinally ofthe center of each holder, and chains 25, connected with the inner edgesof the grate-sections, are wound upon the shaft. The shaft is providedwith a crank 26 and a ratchet and pawl 27, so that the grate-sectionsmay be easily opened downwardly to dump the material after it has beencoked. Over the wheels and axles an inclined flooring 28 is arranged,and around the bottom edges of theinside of the holders are inclinedmoldboards 29 to chute the material that has been coked into grate-sections are A coupling-hook 30 is of the frame of the the openingswhen the opened for dumping. attached to each end holder. One of thehooks preferably has a downturned arm 31, adapted to strike a sill 32 ofthe door, so as to raise and disengage the hook from the hook on thefollowing holder as it leaves the kiln. Over each holder is a sheet-ironhood 33, that fits closely to the frame and extends downward almost tothe level of the track. These hoods are only open at the bottom and areso made that there is but little space between the lattice work sidesand ends of the holder and the walls of the hood. The hoods are removedand the compressed peat, in the form of hollow cylinders 34:, is loadedinto the holders in any desired manner. When the holders are loadedfull, the hoods are replaced and the holders coupled together and drawnor pushed into the coking-chambers of the kiln. Once in place in thekiln the doors are closed and sealed for a few hours, so that thematerial will be subjected to an action of the heated products ofcombustion from the furnaces, which enters at the top of the kiln andpasses out at the bottom. The holders are preferably filled one at atime and are advanced intermittently through the chambers-that is, asfast as the coking of material in one holder is completed that holder isdrawn out and another pushed in at the other end. A holder with materialthat has been su fficiently coked when removed is run along the trackinto a depression, as shown on the right in Fig. 1. This depressioncontains water deeper than the distance from the lower edges of the hoodto the track, so as to seal the hood and prevent the escape of any gasesfrom the interior. The holder remains in this place until the fuel iscold. It is then rolled out of the water to any suitable place and thecoked material dumped out through the bottom.

The temperature of the material in the holders in this kiln is graduallyraised to the coking-point, for the holders when first entering the kilnare at a considerable distance from the furnace. peat when it is heateddo not escape, for the hood is only open at the bottom and only theheavy vapors and moisture which settle pass out at the bottom into thesmoke-fiuewith the heated products of combustion that flow down from thetop of the chambers to the smoke-flue. The material in this kiln isnever subjected to the direct action of the products of combustion;but-itis quickly cooled in such manner that it does not part with thevolitable substance, which render it valuable as a quick-igniting fuel.The products of combustion that pass through the center flues from thebottom of the coking-chambers are The gases which arise from thechilledin the tank and the precipitated substances collected, while the gasespass out of the stack.

We claim as our invention-.

1. A kiln having a coking-chamber, a furnace under one end oftheboking-chamber,

fines extending from the combustion-chamber of the furnace to the top ofthe cokingchamber, a flue extending from the bottom of thecoking-chamber to the stack and a holder with closed sides, ends and topand open bottom, adapted to be moved into and out of the coking-chamber,substantially as specified.

2. A kiln having a coking-chamber, a furnace under one end of thecoking-chamber, flues extending from the combustion-chamber of thefurnace to the top and the bottom of the coking-chamber, dampers forcontrolling the openings from the flues to the cokingchamber, a flueextending from the bottom of the coking-chamber to a stack, and a holderadapted to be moved into and out of the coking-chamber and having aremovable hood that has closed sides, ends and top and open bottom,substantially as specified.

3. A kiln having a coking-chamber with brick side walls and roof, irondoors ateach end of the coking-chamber, a track extending through thecoking-chamber, a furnace located beneath one end of the coking-chamber,a flue connecting the combustion-chamber of the furnace with the top ofthe cokingchamber, a flue extending from the bottom of thecoking-chamber to a stack and a holder movable on the track and having aremovable hood with closed sides, ends and top and open bottom,substantially as specified.

at. A kiln having two coking-chambers with brick side walls, center walland roof, and iron doors at both ends, tracks extending through thecoking-chambers, a furnace extending transversely below one end of thecoking-chambers,flues extending through the walls from thecombustion-chambers of the furnace and opening into the top and bottomof the coking-chambers, dampers for controlling the openings from theflnes into the chambers, fiues extending longitudinally under the bottomof the coking-chambers to a tank and a stack communicating with thetank, substantially as specified.

CASPAR W. METTLER. ADOLF METTLER. JACOB METTLER.

Witnesses:

F. (J. ROCKWELL, H. R. WILLIAMs.

